Difference between Range.include? and Range.member? in Ruby

Question

Ruby has a very useful Range class for expressing alphabetical and numerical ranges.

There are two methods on this class that I can't seem to distinguish between:
Range.include? and Range.member?

Ruby-doc.org gives exactly the same description for both.

What are the differences between them, if any?

Answer 1

They are aliases of each other. If you expand the source code in the docs you see they both refer to the same internal function.

Answer 2

Range.instance_method(:include?) == Range.instance_method(:member?)
#=> true